I guess it is supplemental insurance in Canada? Anyway, I did find the stats on what the private insurance companies are raking in:
"PNHP Co-founders Drs. Steffie Woolhandler and David Himmelstein published this definitive study of the administrative costs of the U.S. health system in the August 21, 2003 edition of the New England Journal of Medicine. After analyzing the costs of insurers, employers, doctors, hospitals, nursing homes and home-care agencies in both the U.S. and Canada, they found that administration consumes 31.0 percent of U.S. health spending, double the proportion of Canada (16.7 percent). Average overhead among private U.S. insurers was 11.7 percent, compared with 1.3 percent for Canada